All Other Nights by Dara Horn

How is tonight different from all other nights? For Jacob Rappaport, a Jewish soldier in the Union army, it is a question his commanders have answered for him: on Passover in 1862 he is ordered to murder his own uncle, who is plotting to assassinate President Lincoln. After that night, will Jacob ever speak for himself? The answer comes when his commanders send him on another mission – this time not to murder a spy but to marry one.